3. The genetic code is commaless, which means that no codon is reserved for punctuations. It means that after one amino acid is coded, the second amino acid will be automatically, coded by the next three letters and that no letters are wasted as the punctuation marks (Fig.
Summer solstice is the first day of summer - it's usually between June 20th and June 23rd. In 2016, the summer solstice takes place on June 20th. We know it's summer because the earth's axis tilts toward the sun from June to September - this means warmer weather and longer days.
Summer solstice arrives on June 21 in 2014, marking the start of the warm season in the Northern Hemisphere and showering people with the most hours of sunlight they will see all year. The solstice arrives when Earth's North Pole is pointed right at the sun, according to Timeanddate.com.